Aeroacoustic Wind Tunnel

• Investigation of aeroacoustic generation and transport mechanisms in circular ducts
• Testing of acoustic duct liners
• Testing and optimization of acoustic and aerodynamic instrumentation and sensors
• Testing and validation of measurement techniques and analysis routines e.g. Radial Mode Analysis (RMA), Beamforming, etc.
• Validation of numerical models (CAA)

The test section can be replaced by different modules such as sound absorbers, instrumental test sections and even rotating turbine or compressor stages which can then be investigated under known inflow conditions.

The current project deals with the investigation of the acoustic transport mechanisms in tubes and turbomachines. An acoustic excitation system was implemented into the test section of the AWT which generates synthetic acoustic fields to facilitate this investigation. These acoustic fields are transported through the test section and cause varying acoustic pressure fields which are then measured in different positions. These measurements allow conclusions to be drawn about the transport mechanism.

The simple design, the high number in measurement positions and the well known acoustic and aerodynamic boundary conditions makes the AWT suitable for the validation of numerical models like CAA (Computational Aeroacoustics).